平均 へいきん故障 こしょう間隔 かんかくでしょう
heikinkoshōkankakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 平均故障間隔

1. Mean time between failures; Probably MTBF

Polite
Presumptive
Conjecture
Computing